select - Extraing individual field values from an InfluxDB database

Question

My apologies if this is a trivial question. I am capturing data from a BMP280 temperature/pressure sensor and publishing it via MQTT. Using Node Red, I am formatting the data into payloads like "BMP2801 temp=23.57,pres=1013.8" and storing it in an influxdb on Raspberry Pi. The queries shown in the image below seem to indicate that I am storing successfully - though possibly not in the right format for retrieval.

My question is how to frame a select statement to retrieve a series of temperature values that can be fed to a chart in the Node Red dashboard. Alternatively, if I am storing the data incorrectly, how should the messages feeding the data to influxdb be formatted? Any tips would be appreciated!

question from:https://stackoverflow.com/questions/66056406/extraing-individual-field-values-from-an-influxdb-database

Answer 1

SOLVED: I had to convert the comma-separated values generated by my sensor into an "object" using the CSV node in Node Red ... then all the fields fell into place!